We're dividing 158289 by 9 
We want to figure out the number of times 158289 can be divided by 9.

Advancing to step 1:
When dividing 1 by 9, we get 0 with a remainder of 1.
The next digit of our result is 0. 
Result so far: 0.0
If we subtract 0 from 1, we get 1.
Include the next digit (5) from the dividend after 1, then repeat: 15 / 9

Advancing to step 2:
9 can be fit into 15 1 times, resulting in a remainder of 6.
The number 1 becomes the next digit in our result. 
Result so far: 1.0
If we take 9 away from 15, we end up with 6.
Grab the next digit (8) from the dividend, add it to 6, then carry on: 68 / 9

Step 3:
68 divided by 9 is 7 with a remainder of 5.
The next digit of our result is 7. 
Result so far: 17.0
Subtracting 63 from 68 leaves us with 5.
Grab the next digit (2) from the dividend, add it to 5, then carry on: 52 / 9

Moving on to step 4:
The number 9 fits into 52 5 times, leaving a remainder of 7.
The number 5 becomes the next digit in our result. 
Result so far: 175.0
Subtracting 45 from 52 leaves us with 7.
Include the next digit (8) from the dividend after 7, then repeat: 78 / 9

On to step 5:
9 goes into 78 8 times with a remainder of 6.
Record the quotient 8 as the next digit in the result. 
Result so far: 1758.0
Subtracting 72 from 78 leaves us with 6.
Append the next digit (9) from the dividend to 6 and continue with: 69 / 9

Going ahead to step 6:
9 goes into 69 7 times with a remainder of 6.
Use 7 as the next digit of our solution. 
Result so far: 17587.0
Deduct 63 from 69 and we're left with 6.
Since there are no more digits in the dividend, we add a zero to the remainder making it 60, and continue the process.

Advancing to step 7:
9 goes into 60 6 times with a remainder of 6.
The next digit of our result is 6. 
Result so far: 17587.6
Subtracting 54 from 60 leaves us with 6.
Since there are no more digits in the dividend, we add a zero to the remainder making it 60, and continue the process.

On to step 8:
9 goes into 60 6 times with a remainder of 6.
Use 6 as the next digit of our solution. 
Result so far: 17587.66
If we subtract 54 from 60, we get 6.
Since there are no more digits in the dividend, we add a zero to the remainder making it 60, and continue the process.

The final outcome is 17587.66, with a leftover of 0.006.